YOKOGAWA digitalYEWFLO multivariable Vortex Flowmeters
The world’s first two-wire Multi-variable Type (with built-in temperature sensor) can directly output the mass flow rate of saturated steam.
The digitalYEWFLO vortex flowmeter combines the field proven sensor and body assembly used in more than 260,000 units installed worldwide with a unique and powerful combination of digital technology that includes spectral signal processing (SSP), a Yokogawa innovation. The digitalYEWFLO vortex flowmeter is accurate and stable, even in harsh process conditions, and has a highly reliable and robust design that delivers improvements in plant efficiency and reduced operating costs
Features: digitalYEWFLO multivariable Vortex Flowmeters
Multivariable Type: option code /MV
Resistance temperature sensor built into vortex shedder bar
User selectable Flow, Temp, Total and other displays
Mass flowrate calculated using temperature readings and steam table data
Able on its own to output mass flowrate
Saturated Steam Measurement Mechanism
<How can the density of steam be calculated from a temperature reading? >
A steam table provides data on the temperature, pressure and density of steam and is provided by a certification body such as the ASME. The saturated steam curve shows the steam saturation point for each pressure/temperature level. The digitalYEWFLO converter calculates the mass flowrate using the density figure from the steam table. With its Spectral Signal Processing system, the digitalYEWFLO is able to accurately measure fluctuations in temperature.
- With superheated steam, density is calculated as a fixed pressure value that includes the superheated temperature value.
With the totalization function, energy consumption data collected over a period of time can be stored in memory and used to devise measures for reducing energy consumption.
Specifications: digitalYEWFLO multivariable Vortex Flowmeters
|
|
Standard |
Multi-Variable |
Reduced Bore |
|
Model & code |
DY Vortex Flowmeter |
Optional code:/MV |
Option code:/R1,/R2 |
|
Fluid to be measured |
Liquid, gas, steam (avoid multiphase flow and sticky fluids) |
|
Nominal size |
15mm ∼ 300mm
(400mm:special) |
25mm ∼ 200mm |
25mm ∼ 200mm |
|
Accuracy |
Liquid: ±1.0% of reading (20000≤Re≤1000)
Liquid: ±0.75% of reading (D×1000≤Re) |
Liquid: ±1.0% of reading
(20000≤Re≤1000) |
|
Gas, steam: ±1.0% of reading (flow velocity less than 35m/s)
Gas, steam: ±1.5% of reading (flow velocity 35m/s ∼ 80m/s) |
|
Output signal |
Simultaneous output(both analog and transistor contact output available) |
|
Process
temperature
range |
-29 deg C - 260 deg C
(standard) |
-29 deg C - 260 deg C
(standard) |
-29 deg C - 260 deg C
(standard) |
|
-196 deg C∼100 deg C
(option: cryogenic version) |
N/A |
N/A |
|
-29 deg C∼450 deg C
(option: high process
temperature version) |
N/A |
-29 deg C∼450 deg C
(option: high process
temperature version) |
|
Process
pressure
limit |
-0.1MPa (-1kg/cm2) to flange rating |
|
Ambient temperature |
-29 to 85 deg C (Integral type / No indicator)
-29 to 80 deg C (Integral type / with indicator)
-29 to 85 deg C (Remote type detector)
-40 to 85 deg C (Remote type converter / No indicator)
-30 to 80 deg C (Remote type converter / with indicator) |
|
Ambient
humidity |
5～100%RH( Non-condensing） |
|
Mounting |
Integral type and Remote type detector: Flange mounting or wafer mounting Remote type converter: 2 inch pipe mounting
JIS10/20/40, ANSI150/300/600/900, JPI150/300/600,DIN PN10/16/25/40 |
|
Electrical connection |
JIS G1/2 female, ANSI 1/2NPT female, ISO M20×1.5 female |
|
Electrical classification |
JIS flameproof, FM explosion proof/intrinsically safe
ATEX (CENELEC flameproof/intrinsically safe/IEC type n)
CSA explosion proof/intrinsically safe : Dual Seal
SAA flame proof/intrinsically safe |
|
Material |
Body: SCS14A cast stainless steel (equivalent to SUS316,CF8M)
Shedder bar: duplex stainless steel (option:anti-corrosion version)
Gasket: SUS316 stainless steel with polytetrafluoroethylene (Teflon) coating
Converter housing and case cover: aluminum alloy or ASTM CF8M (equiv. JIS SCS14A) (Option: /E1) |
|
Applicable Standard |
*EMC Conformity Standards:
EN61326-1 Class A, Table 2 (For use in industrial locations), EN61326-2-3
EN55011 Class A Group 1
*Pressure Equipment Directive:
Notified Body Identification Number 0038 Module H |
